Lock-nut.



, A. IVIcDONALD.

LOCK NIH, APPLICATION FILED JAN-18 l9l6 Llg bfifi. I Patented Aug.29,1916.

' plates 22.

ALEXANDER MCDONALD, 0F HAVRE, MONTANA.

Loon-nor.

menses.

To all whom it may 00mm.- Be it known thatl, ALEXANDER MoDoN- ALD, acitizen of the United States, residing at Havre, in the county of Hilland State of Montana, have invented new and useful Improvements'inLock-Nuts, of which the following is a specification. h

This present invention relates to improvements in look nuts, and theobject of the invention is to construct a nut which shall be eitherintegrally formed of material .duc-. tile under the force of impact of ahammer or to provide the same upon its inner face with a plate or facingof such ductile material whereby the same maybe bent to pro-- vide alocking lug to be received in the depression in the metal plate or to bereceived in a denture in a wooden plate and so look the nutto the plate.I

With these and other objects in view, th e improvement resides -in theconstructlon, combination and arrangement of parts set forth in thefollowing specification and falling within the scope of the appendedclaim. In the drawing: Figure 1 is a transverse sectional view throughtwo plates connected by a bolt on the nut and the said nut beingconstructed in accordance with the present invention, Fig. 2 is aperspective view illustrating the manner in which a tool engages withthe ductile end of the nut and is guided by the said plate and the nutfor indenting the plate to provide the same with a holding lug. Fig. 3is a sectional view taken in a line with the tool, and Fig. 4 isa-perspective view of an inner nut which may be em- -ployed when twonuts are employed on a bolt.

In the drawings the numeral 1 designates a bolt which passes throughopenings in These plates may be of any part of the machinery frame,angle iron or any other structure that a nut, for the bolt, is -tocontact with to lock the same together. If the plates are constructed-ofmetal the outer plate adjacent the bolt opening is pro; vided with asuitable depresslon The Specification of Letters Eatent.

angular division wall between the Patented Aug. so, rare.

" Application filed January 18, 1916. Serial No. 72,829.

numeral 4 designates a nut which is threaded on the bolt and contactswith the outer plate 2.

The nut 41: adjacent its inner face is-pro vided with a continuousgroove or depression 5 forming the outer face of the nut with a rib 6,and the inner wall Provided by the depresslon 5 is arranged angularly sothat the same will form a guide wall for a tool -7 whlch has a pointedend and is adapted to receive an impact of force, such as a blow from ahammer to force a portion of the rib outward of the plate and form thesame with a lug or projection 8 which enters the depression in themetallic plate or which is embedded in the outer face of a wooden plate,when the nut and bolt connect two wooden plates, as will be readilyunderstood. The rib may provide the end of a plate of ductile materialwhich may be secured to the inner face of the nut in any desired orpreferred manner or may be formed therewith in the process ofconstruction, or if desired, the nut may be of such a nature as toreadily permit of the bending or indenting of the rib portion thereof toprovide a locking lug.

When it is necessary that two nuts be required upon the bolt the outerface of the inner nut is formed with radially disposed depressions 9,one of which receiving the lug provided by indenting the rib of theouter nut, and the rib of the inner nut is indented to provide the lugwhich locks the nuts to the plate. a

From the above description, taken in connection with the accompanyingdrawing, the simplicity of the device as well as the advantages thereofwill, it is thought, be perfectly apparent to those skilled in the artto which such invention appertains "without further detaileddescription.

' Having thus described the invention, what I claim is:

The herein described means for locking a nut, comprising 'a nut formed,adjacent its inner face, with argntinuous groove pro viding one ofthe-edges of thevnut with a continuous rim of comparatively thin metal,and the outer Wall provided by the groox e being inclined to thestraight face of the rim, whereby to arrange a tool angularly of the nutand with respect to the rim so that thesaid tool when subjected to animpact of force Will indent the rim to provide a lug or projection uponthe outer face of said

